fife

/F AY1 F/
noun
  1. 1

    A small shrill pipe, resembling the piccolo flute, used chiefly to accompany the drum in military music

verb
  1. 1

    To play this instrument.

numeral
  1. 1

    Used instead of five in radio communications to avoid confusion.

Source: https://en.wiktionary.org/wiki/fife